Grouting machine



Feb. 4, 1958 H. F. ZAGRAY EI'AL 2, 22,

GROUTING MACHINE 6 Sheets-Sheet 1 Filed Dec. 1, 1954 Md. m

0 W M m & A 5w (0 WM av Haw Feb. 4, 1958 H. F. ZAGRAY ETAL 2s32Z,154

GROUTING MACHINE Filed Dec. 1, 1954 I e Sheets-Sheet 2 INVENTORS- HAROLDF. 2464M FLUYD ,M WHCK ATTORNEYS Feb. 4, 1958 H. F. zAeRAY' EIAL2,322,154

GROUTING MACHINE Filed Dec. 1, 1954 6 Sheets-Sheet 4 l-mnozo, F: zaq'envf FLOYD M 14/90 ATTOHVEYS 6 Sheets-Sheet 5 Feb. 4, 1958 H. F. ZAGRAY ETAL GROUTING MACHINE Filed Dec. 1, 1954 mm 2 m mm w 1 INVENTORS #099020F. 246 74) 5 rzoyo w. wee/q ATTORNEYS H. F. ZAGRAY ET Filed Dec. 1, 1

6 Sheets-Sheet INVENTOR HARaLD 5 5 W WAG 4 RNEYS 9 either of the mixingtanks United States PatentO GROUTING MACHINE Harold F. Zagray, Canton,and Floyd W. Wack, Louisville, Ohio, assignors to Precision BuildingSystem, Inc., Canton, Ohio, a corporation of Ohio The invention relatesto grouting machines and more particularly to certain improvementsuponthe type of grouting machine shown in the prior Patent No.

2,633,340, dated March 31, 1953, issued upon application of Harold F.Zagray and Floyd W. Wack.

Such grouting machines are especially adapted for use in erectingmasonry Walls of building blocks or bricks of the general type disclosedin Stewart Patent No. 2,558,630, dated June 26, 1951 and in priorpatents .to Harold F. Zagray No. 2,634,602, dated April '14, 19,53 andNo. 2,655,032, dated October 13, 1953.

Building blocks or bricks of this general type have vertical openingstherethrough and communicating horizontal and vertical grooves in thetop, bottom and end walls thereof, forming mortar passages locatedentirely within the outlines of the block or brick.

Such building blocks or bricks are laid up dry, in. a wall ofconsiderable height, after which grout is poured into the openings inthe uppermost courseof blocks, filling all of the communicating openingsand grooves of the blocks with grout, which, upon hardening, "forms acontinuous network of mortar entirely within the outline of the blocks.

Grouting machines of the character to which the invention pertains, areused for pouring or forcing grout into this network of communicatingpassages, and include a pump, and a hose line by means of which thegrout may be carried to a considerable height and poured or pumped intothe openings in the uppermost course of the wall.

Prior to my invention, grouting machines of this general type wereprovided with a single mixing tank or reservoir, from which the groutwas withdrawn to a pump from which it was discharged through a hoseline.

Such machines do not satisfactorily mix and blend the ingredients of thegrout, and do not have satisfactory facilities for thoroughly cleaningthe grout therefrom, after a grouting operation is completed.Furthermore, they do not have means for operating either the pump or themixing tank independently of the other.

It is therefore an object of the present invention to provide a groutingmachine which overcomes the abovenamed disadvantages and difficulties,and which embodies certain improvements upon grouting machines of thisgeneral type.

Another object is to provide a grouting machinehaving a first or initialand a second or final mixing tank, the grout being initially mixed inthe first mixing :tank and then discharged into the second mixing tank,which also functions as a reservoir from which the grout is withdrawn tothe pump. i

A further object is to provide means for operating or the pump,independently of the others.

A still further object is to provide such a grouting machine, in whichthe first or initial-mixing tank is mounted for tilting in oppositedirections, whereby-the contents thereof, when properly; mixed, pmayvhemdis- .machine .is ;not iinuuse, zin order to 2,822,154 j Patentedeb. 4, 1958 .2 charged into the reservoir, -or;final,mixing tank, or maybe discharged, .through a grating or ,chute, onto the groundwhen itisdesiredto-cleanthe machine'after a grouting, operation is completed.

.Another object of the invention'is to-providea grout- .ingrnachine ofthecharaeter referred ;to, in which; the discharge outlet of the-firstortinitial mixing tank .is covered with a screen, and agitatingpad:d1es, in said mixing, chamber -,wipe the grout through 'said screen.

A further object is to provide a grouting machine of .this typein whichthe wipingpaddles in the initial mixing :tank are formed ofrubber, or,similar flexible material.

A still further object is toprovide such a machine v,with convenient andreadily operable facilities ;for,c1eaning out and flushingthemixingztanks, pump andhoseline after use of the machine.

Another object ofthe invention is to provide means .for continuously.recirculatinggrout from the pump to the final mixing tank, during shortperiods when the prevent clogging of theshoserlineq A further object isto provide a water line in the machine, .with hose.-connections.forfurnishing water to the init-ial.mixing tankandtto the-pump.

-A still .further objectdsltmprovide.such a grouting machine,permanently mounted upon a truck, wherebythema'chinezisleasilyttransported and'may be readily movedfrom,onezlocation to another, as may-benequired,

during the building of a masonry wall.

The above and other objects, apparent fromthe-drawings and followingdescription, [may :be attained, the above described difficultiesovercome and the advantages and results obtained, by the apparatus,construction,arrangements and combinations,.subcombinations and parts,which comprise the present invention, a preferredembodiment of which,illustrative ofthe bestmode'inwhich applicant has contemplatedapplying-theprincipl e, being set forth in detail in the following -description and illustrated in the accompanying drawings forming a parthereof.

The invention may be describedin general terms, as comprising a portablegroutingmaichine, permanently mounted upon a specially constructed truck-bed,;fo r ease in transportation ,and in -moving the'machinetodifferent positions adjacent to a masonry wall under construction. Aninitial mixing tank is pivotally' mounted upon the truck bed for tiltingin one direction to pour mixed grout into a second or final mixingtank,-n1ounted at alow'er position upon the truck bed, or in theopposite direction for pouring any remaining grout through an opening orgrating in the truck bed, in order to" clean said initial mixing tankafter agrouting operation hasbeen completed'. i

The discharge outlet of the initial mixing tank is covered with a wiremesh screen, and a rotatable agitator is located within said initialmixing tank and provided with paddles of rubber or the likecontactingsaid screen for wiping the grout .therethrough.

An'inlet opening is formed inthe initial mixing'tank adjacent to thedischarge outlet,a grating being; located over said inlet opening'and'atserratedblade is located transversely across the center oftheinletppening-for cutting or breaking open bags of cement and thelike' topermit the contents thereof to be pouredinto the initial mixing tank. I

Grout is withdrawn from the second or final mixing tank by a pump whichdischarges the grant througha hose line provided with a nozzle andshut-off valve.

Means is provided for-driving the agitators in themixing tanks, and thepump, from the conventional powertakeon of the truck,- with separateclutches'fon independently connecting either mixing tank or the pump tothe power means.

A water line is provided with hose connections for attaching a hose tofurnish water to the initial mixing tank, and for connecting a hose tothe pump for flushing and cleaning the same after use, and a hoseconnection is provided on the second or final mixing tank for connectingthe return hose line thereto, or, in the event a single hose line isused, for connecting the end thereof to the final mixing tank, so as tocontinually recirculate grout from the pump to said mixing tank duringperiods when the machine is being moved from one position to another.

A preferred embodiment of the invention thus set forth in general terms,is illustrated in the accompanying drawings, in which:

Fig. 1 is a rear elevation of a grouting machine embodying theinvention, showing the pump which forces the grout through the flexiblehose, viewed as on the line 11, Fig. 2, showing the parts in the normalposition;

Fig. 2 is a top plan view of the improved grouting machine, showing theparts in the same positions as in Fig. 1;

Fig. 3 is a section taken as on the line 3-3, Fig. 2, showing the frontside of the grouting machine in elevation;

Fig. 4 is a transverse sectional view, taken as on the line 44, Fig. 2,showing one end of the grouting machine in elevation, and illustratingthe sprocket chain drive;

Fig. 5 is a section taken as on the line 5-5, Fig. 1, showing. theopposite end of the grouting machine in elevation;

Fig. 6 is a transverse sectional view on the line 66, Figs. 1 and 2,showing the initial mixing tank in full lines tilted to position to pourgrout into the final mixing tank, and in broken lines tilted to positionto empty grout through the grating in the floor of the truck; and

Fig. 7 is a detached perspective view of the rotary agitator shaft andpaddles in the initial mixing tank.

Reference is now made to the detail construction and operation of theembodiment of the invention illustrated in the drawings, in whichsimilar numerals refer to similar parts throughout.

The grouting machine to which the invention pertains is preferablypermanently mounted upon a motor truck, a portion of the fioor of whichis indicated at It). A fixed, final mixing tank 11, of generallycylindrical shape, and an oscillatory, initial mixing tank 12, also ofgenerally cylindrical form, comprise important parts of the groutingmachine.

The final mixing tank 11 is mounted partially below the level of thefloor 19 of the truck, the lower portion of said tank being locatedthrough an opening 13 in the floor, as best shown in Fig. 6.

A drain 14 is located in the bottom of the final mixing tank, below thetruck floor It), and is normally closed as by the screw plug 15, wherebyany grout remaining in the final mixing tank may be drained onto theground, and the tank may be flushed and cleaned so that it is in propercondition for use again.

For the purpose of keeping the grout in the final mixing tank in propercondition for use, a continuously rotating agitator is provided therein.This agitator comprises the shaft 16, concentrically journalledlongitudinally through the tank 11, and having a plurality of groups ofpaddles or blades thereon.

1 Each group of paddles or blades comprises a radially disposed arm 17,fixed upon the shaft 16,.and having a plurality of spaced, angularlydisposed paddles 18 fixed thereon, throughout its length, and a wiperblade 19 at its outer end, having an arcuate outer edge portion 20 forwiping contact with. the inner walls of the cylindrical tank 11.

Preferably, there areltourlgroups of these paddles and blades, twogroups being connected to the middle portion of the shaft 16,diametrically opposite to each other, as indicated at a-a, the other twogroups being located one near each end of the shaft, as indicated at bb,each of the latter groups having a radially disposed blade 21 for Wipingthe adjacent end wall of the tank.

For the purpose of admitting grout to the final mixing tank, from theinitial mixing tank 12, an inlet opening 22 is provided in the upperportion of the final mixing tank, and preferably extends from the top ofthe tank, as indicated at 23, to a point on the side toward the initialmixing tank, as indicated at 24.

The initial mixing tank 12 is rotatably mounted upon bearings 25,mounted upon the upper ends of uprights 26, which are supported upon thefloor 11 Journals 27 are attached to opposite ends of the tank 12, andjournalled in the bearings 25, whereby the initial mixing tank may beoscillated from the normal position shown in Figs. 1 to 5, to thepositions shown in Fig. 6.

An inlet opening 28 is provided in the initial mixing tank 12, andpreferably provided with a series of spaced longitudinally disposed rodsor bars forming a grating 29 thereon, with a central, transverselydisposed, serrated blade 30 for cutting or tearing open paper sacks ofcement or a mixture of cement and aggregate suitable for making grout.The grating 29 is hinged at one side of the opening 28, as shown at 29a.

An agitator, similar to that in the final mixing tank, is located in theinitial mixing tank, the shaft 16a thereof having the journal portions31 at its ends, journalled within the hollow trunnions 27 of the initialtank 12, whereby the agitator may rotate relative to the tank 12.

A plurality of groups of paddles or blades are carried by the shaft 16a,each group comprising a radially disposed arm 17a, fixed upon the shaft16a, and having a plurality of spaced, angularly disposed paddles 18afixed thereon, throughout its length, and a wiper blade 19a at its outerend, having an arcuate edge portion 20a, preferably formed of rubber orthe like, for wiping contact with the inner walls of the initial mixingtank 12.

There are preferably four groups of these paddles and blades, two groupsbeing connected to the middle portion of the shaft 16a, diametricallyopposite to each other, as indicated at a-a', the other two groups beinglocated one near each end of the shaft, as indicated at b--b', each ofthe latter groups having a radially disposed blade 21a for wiping theadjacent end wall of the initial mixing tank 12.

At a point adjacent to the inlet or charging opening 28, the initialmixing tank is provided with an outlet or discharge opening 32, providedwith a wire mesh or screen 33, through which the mixed grout may bepoured into the final mixing tank 11, when the initial mixing tank isrotated to the position shown in Fig. 6.

An opening 34 is formed in the truck floor 10, at the opposite side ofthe initial mixing tank from the final mixing tank 11, and is coveredwith a grating or grill 35, so that any grout remaining in the initialmixing tank may be poured therethrough, onto the ground, at the end ofthe days work, by rotating the initial mixing tank to the broken lineposition shown in Fig. 6.

Referring now more particularly to Figs. 2 and 3, the

1 conventional power take-ofi shaft of the truck is indicated at 36, andfor the purpose of providing means for operating the grouting machine, auniversal joint 37 connects this power take-off shaft to the main driveshaft 38 of the grouting machine.

This latter shaft is journalled in suitable bearings 39, mounted uponthe angle members 40, supported upon the lower flanges of the channelbars 41, which are suspended from the I-beams 42 of the truck body.

, A sprocket wheel 43 is fixed upon the drive shaft 38, and operativelyconnected, as by the sprocket chain 44, to the relatively large sprocketwheel 45, fixed upon the countershaft 46. The sprocket wheel 47 is fixedupon e. ou te haft. andl smnneci d. ssby. hetspmcke chain 48, to therelatively large sprocketwheel49, upon the adjacent hollow trunnion27 ofthe initial mixing tank.

The shaft, 16 ofthe agitator infihefinal mixingtank 11 is provided withtrunnions 50:at,its ends, ,journalledfin bearings 51 at oppositeends ofthe, tank. A.relatively largesprocket wheel 52is fixed upon one;ofjthetrunnions 50 andis connected, as.by. the-sprocketchain 5,3, with-arelatively small sprocket wheel 54, upon theshaft 46, whereby the.agitator in the finalmixing tank may be driven from the main drive shaft38.

Arclutch is provided upon the shaft 50 for operatively connecting theloosesprocket wheel 52, to the shaft. 50. This clutch comprisestheclutch member 55,.fixed.to .the sprocket wheel 52, and theslidable,,keyedclutchmember 56 for engagement therewith.

A clutch lever 57 is fulcrumedasat 58 upona bracket 59, and operativelyconnected to the slidingclutch 56in conventional manner, as by the studs60 uponthe clutch member locatedthroughslots 61 in-the operating lever57.

In the same manner, a clutch is provided for controlling the agitator inthe initial mixing tank, this;clutch comprising the clutch member 62fixed to the loose'sprocket 49, on the trunnion 31 of the agitator shaft16a, and the sliding, keyed clutch member 63 adapted to be operated bythe lever 64 fulcrumed as at 65 upon the bracket 66 and connected to theclutch member 63, as by the studsv 67 on the clutchmember and theslots,68 in the lever.

A pump, indicated generally at 69, of the same general type as the pumpdisclosed, in my prior Patent No. 2,663,340, is providedtfor pumpinggrout from the final mixing chamber 11 through a flexible hose to themasonry wall under construction.

This pump comprises a housing 70, havinganinlet 71 communicating withthe bottom of thefinal mixing tank 11, and an outlet 72, provided with ahose coupling 73, to which a flexible hose 74 is connected. A helical orscrew rotor (not shown) similar to that disclosed in my priorpatent'above referred to, is located within the housing 70, and theshaft 75 of said rotor is extended through the opposite end of thehousing, from the outlet 72.

Brackets 76and 77, depending from the final mixing tank 11 and the truckbody respectively, support the pump housing 70 parallel to the mixingtanks at one side of the truck body,

A clutch member 78 is rotatably mounted upon the pump'shaft 75, and hasa sprocket wheel 79 fixed thereto, and connected, by the chain 80, withthe sprocket Wheel81 upon the main drive shaft 38. The clutch member 82is slidably keyed upon the pump shaft 75, and adapted to be moved intoengagement with the rotating clutch member 78 by the lever 83, fulcrumedat 83' upon the truck frame and extending to the opposite side of themachine.

The lever 83 has a yoke 84 thereon, having slots 85 therein whichreceive the studs 86 on the sliding clutch member 82, and an operatinghandle 87 is fixed to the lever 83 and extends outwardly on the pumpside of the machine, then the pump may be started or stopped, either byan operator standing on the truck adjacent to the initial mixing tank,or by another operator standing on the ground at the pump side of thetruck.

The flexible hose 74 may be of any desired length required for theheight to which the grout must be pumped, and is provided at its outerend with a nozzle 88, having a cut-off valve 89 thereon, whereby thedischarge of grouting material therefrom may be manually controlled.

For the purpose of preventing the grouting material from hardening inthe hose 74, when the valve 89 is closed, a return hose line 90communicates with the hose '74 adjacent to the nozzle 88, and isconnected at its other end to the hose coupling 91 whichcommunicateswith the upper portion of the final mixing tank 11.

Ar. T -connection 92isinterposed'inthe hose line 74,

between, thegnozzle. 88,,and the return hose 90,. andis prQvidedPwith-avalve 93, of any suitable type. This valve 93 may be closed duringnormal operation, when thehshut-otf valve 89is open, but, if theshut-off valve 89 is closed for any considerable lengthoftime, thevalve93 is open so that grouting material may be continuously pumped from thefinal mixing tank. 11, through the hose 74 and back through the returnhose to, the tankll, whereby the grouting material will remain at properconsistency andthe machine is at all times ready for operation by merelyclosing the valve 92 and opening the shutoff'valve 89.

Forthe purpose of furnishing water to the machine, a pipe line 94 islocated transversely of the truck and provided, at the pump side of themachine, with a threaded nipple 95 to which a hose may be connected, forattachment to a faucet or the like.

At the other side of the machine, the pipe :line 94 is disposedvertically, as shown at 96, and terminates in a downwardlydirected spout97, for discharging water into the initial mixing tank 12, as throughthe screened opening 32 thereof. A valve 98 is provided for controllingthe dischal fiof water through the spout 97.

A T -connect, on 99 is provided in the upright pipe. 96, and a shortlength of pipe 100 isattached thereto, the outerend thereof beingthreaded, as shown at 101, for attaqhing a hose for, flushing andcleaning the final mixing tank, after a days .work.

In order to flush out and clean the pump, afteruse, a pipe 102 connectsthe Water supply pipe 94into the. interior oftthewpumphousing 70, and is.providedwith a normally closed valve 103, which maybe opened where itis desired to flush the pump.

It should be. understood that, ifdesired, the return hose 9.0 may. bedispensed with. In this case, whenever the nozzle 88 is not in use for ashort period of time, it may be detached from the hose 74,v and the endof the hose maybe attached to the coupling 91 upon the final mixingtank, so that grout will be pumped continuously through said hose andreturned to the final mixing-tank.

In the operation of the machine, the desired amounts of cement,aggregate and water are charged into the, initialmixing tank, and arethoroughlymixed to the proper consistency therein by the rotatingagitator-blades. The initial mixing tank is held in the position showninv Fig,- 5, bythe operating rod 104, located through the eye 105 on theside of the tank 12, the inner end of the rod .104 contacting the stop106, pivoted as at 107 upon the bracket 108.

After the grout is mixedto'proper consistency in the initial mixing tank12, the operator grasps therod104 and oscillates the tank 12 to theposition shown in Fig. 6, discharging the grout from the initial mixingtank 12, through the screen 33, into the final mixing tank.

The rubber tipped blades 20a, of the agitator in-the initial mixingtank, wipe the grout through, the screen 3.3, so that the grout issmooth and free fromany hard lumps or oversize particles of aggregate.

The grouting material is continually agitated after; it is charged intothe final mixing tank, and is withdrawn therefrom by the pump, andpumped through the hose line 94 to the desired location and height,where it is discharged from the nozzle 88 into the mortar spaces of themasonry wall under construction.

It will be seen that the agitators in each of the mixing tanks, as wellas the pump, may be operated independently, by manual operation of therespective clutch levers, and that the pump clutch may be manuallyoperated from either side of the machine.

After the days work is completed, any grout still remaining in theinitial mixing tank may be discharged therefrom, through the grating 35in the truck floor, by tilting said tank to the broken line positionshown in Fig. 6.

For this purpose, the rod 104'is removed from the eye 7 105 on the endof the initial mixing tank 12, and inserted into the eye 119, and thepivoted stop 106 is thrownup, out of the path of said rod.

The final mixing tank 11 may be drained of any remaining grout, byremoving the clean-out plug 15, and both tanks may be thoroughly flushedand washed by a hose attached to the coupling 101 of the water supplypipe, the valve 111 being of course opened for this purpose.

By opening the valve 103, in the pipe 102, the pump and hose line 74 maybe thoroughly flushed and washed, so that all grout is entirely removedfrom the machine, and it is ready for use whenever desired.

In the foregoing description, certain terms have been used for brevity,clearness and understanding, but no unnecessary limitations are to beimplied therefrom beyond the requirements of the prior art, because suchwords are used for descriptive purposes herein andare intended to bebroadly construed.

Moreover, the embodiments of the improved construction illustrated anddescribed herein are by Way of example, and the scope of the presentinvention is not limited to the exact details of construction.

Having now described the invention or discovery, the construction, theoperation, and use of preferred embodiments thereof, and theadvantageous new and useful results obtained thereby; the new and usefulconstruction, and reasonable mechanical equivalents thereof obvious tothose skilled in the art, are set forth in the appended claims.

We claim:

1. A grouting machine comprising a final mixing tank, agitating meanstherein, an initial mixing tank, agitating means in the initial mixingtank, means pvotally mounting the initial mixing tank above the finalmixing tank, there being a discharge outlet in the upper portion of theinitial mixing tank, means for tilting the initial mixing tank todischarge the contents thereof through said outlet into the final mixingtank, means for tilting the initial mixing tank away from the finalmixing tank to discharge the contents thereof, a pump having an inletand an outlet, means connecting the final mixing tank to the pump inlet,a flexible hose connected to the pump outlet, a prime mover and meansfor independently operatively connecting the prime mover to the pump andto each of said agitating means.

2. A grouting machine comprising a final mixing tank, agitating meanstherein, a hose connection on the final mixing tank, an initial mixingtank, agitating means in the initial mixng tank above the final mxingtank, there being a discharge outlet in the upper portion of the initialmixing tank, means for tilting the initial mixing tank to discharge thecontents thereof through said outlet into the final mixing tank, meansfor tilting the initial mixing tank away from the final mixing tank todischarge the contents thereof, a pump having an inlet and an outlet,means connecting the final mixing tank to the pump inlet, a flexiblehose connected to the pump outlet, means for connecting the end of saidflexible hose to said hose connection for recirculating grout from thepump to said final mixing tank, a prime mover and means forindependently operatively connecting the prime mover to the pump and toeach of said agitating means.

3. A grouting machine comprising a final mixing tank, agitating meanstherein, an initial mixing tank, agitating means in the initial mixingtank, means pivotally mounting the inital mixing tank above the finalmixing tank, there being a discharge outlet in the upper portion of theinitial mixing tank, means for tilting the initial mixing tank todischarge the contents thereof through said outlet into the final mixingtank, means for tilting the initial mixing tank away from the finalmixing tank to discharge the contents thereof, a pump having an inletand an outlet, means connecting the final mixing tank to the pump inlet,a flexible hose connected to the pump outlet, a prime mover, and meansfor independently operatively connecting each of said agitating meansand said pump to said primemover.

4. A grouting machine comprising a final mixing tank, agitating meanstherein, an initial mixing tank, rotatable agitating means in theinitial mxing tank, means pvotally mounting the initial mixing tankabove the final mixing tank, there being a discharge outlet in the upperportion ofthe initial mixing tank, a relatively fine mesh screencovering said discharge outlet, said rotatable agitating means includingpaddles for wiping contact with said screen, means for tilting theinitial mixing tank to dis charge the contents thereof through saidoutlet into the final mixing tank, said paddles wiping grout throughsaid screen when the initial mixing tank is tilted to dischargeposition, a pump having an inlet and an outlet, means connecting thefinal mixing tank to the pump inlet, a flexible hose connected to thepump outlet, and a prime mover operatively connected to the pump and tosaid agitating means.

5. A grouting machine comprising a final mixing tank, agitating meanstherein, an initial mixing tank, rotatable agitating means in theinitial mixing tank, means pivotally mounting the initial mixing tankabove the final mixing tank, there being a discharge outlet in the upperportion of the initial mixing tank, a relatively fine mesh screencovering said discharge outlet, said rotatable agitating means includingflexible paddles for Wiping contact with said screen, means for tilitingthe initial mixing tank to discharge the contents thereof through saidoutlet into the final mixing tank, flexible paddles wiping grout throughsaid screen when the initial mixing tank is tilted to dischargeposition, a pump having an inlet and an outlet, means connecting thefinal mixing tank to the pump inlet, a flexible hose connected to thepump outlet, and a prime mover operatively connected to the pump and tosaid agitating means.

6. A grouting machine comprising a final mixing tank, agitating meanstherein, an initial mixing tank, agitating means in the initial mixingtank, means pivotally mounting the initial mixing tank above the finalmixing tank, there being a discharge outlet in the upper portion of theinitial mixing tank and an inlet opening adjacent to the dischargeopening, means for tilting the initial mixing tank in one direction todischarge the contents thereof through said discharge outlet into thefinal mixing tank, means for tilting the initial mixing tank in theopposite direction for emptying the contents thereof through said inletopening, a pump having an inlet and an outlet, means connecting thefinal mixing tank to the pump inlet, a flexible hose connected to thepump outlet, a prime mover and means for independently operativelyconnecting the prime mover to the pump and to each of said agitatingmeans.

7. In combination with a self-propelled truck having a bed and a powertake-off, a grouting machine comprising a final mixing tank mounted uponthe truck bed, agitating means therein, an initial mixing tank pivotallymounted upon the truck bed above and at one side of the final mixingtank, agitating means in the initial mixing tank, there being adischarge opening in the truck bed at the opposite side of the initialmixing tank from the final mixing tank, the initial mixing tank having adischarge outlet in its upper portion and an inlet opening adjacent tothe discharge outlet, means for tilting the initial mixing tank in onedirection to discharge the contents thereof through said dischargeoutlet into the final mixing tank, means for tilting the initial mixingtank in the opposite direction for emptying the contents thereof throughthe inlet opening in said initial mixing tank and through said dischargeopening in the truck bed, a pump .having an inlet and an outlet, meansconnecting the final mixing tank to the pump inlet, a flexible hoseconnected to the pumpoutlet, and means for operatively connects ,sa atat nsmeansand sa Pump to said. Power take-off.

8. In combination with a self-propelled truck having a bed and a powertake-01f, a grouting machine comprising a final mixing tank mounted uponthe truck bed, agitating means therein, an initial mixing tank pivotallymounted upon the truck bed above and at one side of the final mixingtank, agitating means in the initial mixing tank, there being adischarge opening in the truck bed at the opposite side of the initialmixing tank from the final mixing tank, the initial mixing tank having adischarge outlet in its upper portion and an inlet opening adjacent tosaid discharge outlet, a grating hingedly mounted over said inletopening, a transversely disposed serrated blade across the center of theinlet opening, means for tilting the initial mixing tank in onedirection to discharge the contents thereof through said dischargeoutlet into the final mixing tank, means for tilting the initial mixingtank in the opposite direction for emptying the contents thereof throughthe inlet opening in said initial mixing tank and through said dischargeopening in the truck bed, a pump having an inlet and an outlet, meansconnecting the final mixing tank to the pump inlet, a flexible hoseconnected to the pump outlet, and separate means for independentlyoperatively connecting each of said agitating means and said pump tosaid power take-off.

9. A grouting machine comprising a final mixing tank, agitating meanstherein, an initial mixing tank, agitating means in the initial mixingtank, means pivotally mounting the initial mixing tank above the finalmixing tank, there being a discharge outlet in the upper portion of theinitial mixing tank, stop means upon the initial mixing tank, a pivotedlug upon the machine for contact with said stop means to prevent tiltingmovement of said initial mixing tank away from the final tank, means fortilting the initial mixing tank to discharge the contents thereofthrough said outlet into the final mixing tank, means for tilting theinitial mixing tank in the opposite direction for emptying the contentsthereof through said discharge outlet when said pivoted lug is moved outof the path of said stop means, a pump having an inlet and an outlet,means connecting the final mixing tank to the pump inlet, a flexiblehose connected to the pump outlet, a prime mover and means forindependently operatively connecting said prime mover to the pump and toeach of said agitating means.

10. A grouting machine comprising a final mixing tank, agitating meanstherein, an initial mixing tank, agitating means in the initial mixingtank, means pivotally mounting the initial mixing tank above the finalmixing tank, there being a discharge outlet in the upper portion of theinitial mixing tank, means for tilting the initial mixing tank todischarge the contents thereof through said outlet into the final mixingtank, a pump having an inlet and an outlet, means connecting the finalmixing tank to the pump inlet, a valve in the pump inlet, means foroperating said valve from a point adjacent the initial mixing tank andmeans for operating said valve from a point adjacent the pump, aflexible hose connected to the pump outlet, at prime mover and means forindependently operatively connecting said prime mover to the pump and toeach of said agitating means.

11. A grouting machine comprising a final mixing tank, agitating meanstherein, an initial mixing tank, agitating means in the initial mixingtank, means pivotally mounting the initial m-ixing tank above the finalmixing tank, there being a discharge outlet in the upper portion of theinitial mixing tank, a relatively fine mesh screen covering saiddischarge outlet, there being an inlet opening in the initial mixingtank adjacent to the discharge outlet therein, a grating over said inletopening, a transversely disposed serrated blade centrally located acrosssaid inlet opening, means for tilting the initial mixing tank todischarge the contents thereof through said outlet into the final mixingtank, a pump having an inlet and an outlet, means connecting the finalmixing tank to the pump inlet, a flexible hose connected to'the pumpoutlet, at prime mover and means operatively connecting the prime moverto the pump and to said agitating means.

12. A mixing tank for mixing grout and the like, means pivotallymounting said tank, there being a discharge outlet in the upper portionof the tank, a relatively fine mesh screen covering said dischargeoutlet, there being a filling opening in said tank adjacent to thedischarge outlet, a grating over said filling opening, a transverselydisposed serrated blade centrally located upon said grating, a rotaryagitating means within the tank, flexible paddles upon said agitatingmeans for wiping contact with said screen, and means for tilting thetank upon its pivot to discharge the contents thereof through saidscreen, said flexible paddles wiping grout through said screen when thetank is tilted to discharge position.

13. A grouting machine comprising a final mixing tank, agitating meanstherein, an initial mixing tank, rotatable agitating means in theinitial mixing tank, means pivotally mounting the initial mixing tankabove the final mixing tank, there being a discharge outlet in the upperportion of the initial mixing tank, a relatively fine mesh screencovering said discharge outlet, said rotatable agitating means includingrubber paddles for wiping contact with said screen, means for tiltingthe initial mixing tank to discharge the contents thereof through saidoutlet into the final mixing tank, said paddles wiping grout throughsaid screen when the initial mixing tank is tilted to dischargeposition, a pump having an inlet and an outlet,

means connecting the final mixing tank to the pump inlet,

a flexible hose connected to the pump outlet, and a prime moveroperatively connected to the pump and to said agitating means.

References Cited in the file of this patent UNITED STATES PATENTS523,195 Brown July 7, 1894 1,460,571 Carey July 13, 1923 1,613,846 PyeJan. 11, 1927 1,828,317 Clapp Oct. 20, 1931 1,907,836 Lauterbar et al.May 9, 1933 2,580,551 Kacena Jan. 1, 1952 2,633,340 Zagray et a1 Mar.31, 1953

